Topological susceptibility and Instanton size distribution from over-improved cooling

Abstract

We measure the topological susceptibility by cooling with an over-improved action. In contrast with usual cooling, large instantons survive over-improved cooling {\em indefinitely}. By varying the parameter of the over-improved cooling action, we measure the instanton size distribution.

Comments: 4 uuencoded PostScript pages, contribution to LAT95 (fig.2 simplified to conserve space; available upon request)